TF7038GB_A_NOT
4.
INTEGRATION IN THE BUILDING HEATING SYSTEM
To best use the Connect WP exhaust air heat pump, we recommend hydraulically integrating it into the
building heating system as shown in the system diagrams below. The device always operates in the
optimum power range and with the highest efficiency. Seasonal changes in heating and hot water
requirements are automatically recorded and adjusted. Due to this type of integration of the system, the
building heating technology remains virtually unaffected.
RECOMMENDATION AND SYSTEM DIAGRAM WITH AWN STRATIFIED STORAGE
To integrate an AWN in the heat supply of a building, Aereco recommends a combination with a stratified
storage tank with discharge system and preheating stage for domestic hot water (DHW). This enables both
an increase in the return flow of the heating circuit during the heating period and support for hot water
preparation throughout the year. As a result, the heat sink available to the AWN is maximised, as are
running times and contribution margins.
With this concept, it is not necessary to communicate with the components in the rest of the heating
system. An independent controller measures the temperature in the upper section of the stratified tank (S1)
and the heating water return (S2) in the heating circuit installed on site. The controller takes these
measured variables into account and controls the discharge pump (P) so that the heating water return flow
is always increased (S1 > S2).
DW preheating is automatically ensured by passing through a stainless-steel coil in the stratified storage
tank. The cold water (CW) is thus heated and then enters the water heater. Due to the small volume in the
preheating, this stage can be designed as a purely continuous system. A DW storage tank with an internal
heating water coil (storage system) would be considerably less efficient for preheating.
The heating water pump integrated in the exhaust air heat pump constantly pumps the heat via the heating
water into the stratified storage tank, where a simplified diagram is shown for use with central heating and
hot water preparation. In the case of deviating concepts, it is possible and necessary to appropriately adapt
the integration logic.
The respective concrete dimensioning and implementation only results from an individual viewpoint. This
drawing is to be understood as a non-binding planning proposal and does not replace any execution planning.
The shut-off and safety devices required for professional installation are not included.
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